frequency - Computer Definition

The Institute of Electrical and Electronics Engineers (IEEE) defines frequency as the number of complete cycles of sinusoidal variation per unit time, with the unit of time generally being that of one second. Plotting y = sin x, where x is expressed in radians, yields a sine wave as illustrated in Figure F-8. (From the Latin radius, a radian is a unit of plane angular measurement equivalent to the angle between two radii that enclose a section of a circle's circumference [arc] equal in length to the length of a radius.There are 2 radians in a circle.) A complete sine wave entails a cycle as measured from a point of zero (0) amplitude to a point of maximum positive amplitude (+A), through zero to a point of maximum negative amplitude (

The number of oscillations (vibrations) in one second. Frequency is measured in Hertz (Hz), which is the same as "oscillations per second" or "cycles per second." For example, the alternating current in a wall outlet in the U.S. and Canada is 60Hz. Electromagnetic radiation is measured in kiloHertz (kHz), megahertz (MHz) and gigahertz (GHz). See wavelength, frequency response, audio, carrier and space/time.

Frequency

The frequency is the number of oscillations per second. The higher the frequency (the closer the ripples would be in this diagram) and the shorter the wavelength.

Sentence Examples

Think of them ... like frequency and intensity, although that's far from the correct terms.

They also looked for double characters, understanding only certain letters doubled with any frequency in English language words.

The difference in this case is that it is getting to be a pattern — increasing in frequency and violence.

Seeing that the tribe was blotted out at the beginning of the 3rd century B.e., we can scarcely wonder that no record of its speech survives; but its geographical situation and the frequency of the co-suffix in that strip of coast (besides Aurunci itself we have the names Vescia, Mons Massicus, Marica, Glanica and Caedicii; see Italic Dialects, pp. 283 f.) rank them beyond doubt with their neighbours the Volsci.

They occur with frequency also in northern Africa, and in many parts of North and South America the aboriginal populations have practised similar customs. Sepulchral tumuli, however, vary so much in shape and size that the external appearance is no criterion of age or origin.

Words near frequency in the dictionary

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The presence of chromosomes of North African origin (E3b1b-M81; Cruciani et al., 2004) [in Rio de Janeiro] can also be explained by a Portuguese-mediated influx, since this haplogroup reaches a frequency of 5.6% in Portugal (Beleza et al., 2006), quite similar to the frequency found in Rio de Janeiro (5.4%) among European contributors.